import tkinter

root = tkinter.Tk()
root.geometry('800x600')


# 第一行
button1 = tkinter.Button(root,text='CE')
button1.grid(row=2,column=4)

button2 = tkinter.Button(root,text = 'C')
button2.grid(row=2,column=8)

button3 = tkinter.Button(root,text = '×')
button3.grid(row=2,column=12)

button4 = tkinter.Button(root,text = '÷')
button4.grid(row=2,column=16)

# 第二行

button5 = tkinter.Button(root,text = '7')
button5.grid(row=3,column=4)

button6 = tkinter.Button(root,text = '8')
button6.grid(row=3,column=8)

button7 = tkinter.Button(root,text = '9')
button7.grid(row=3,column=12)

button8 = tkinter.Button(root,text = '*',font='20')
button8.grid(row=3,column=16)







root.mainloop()